منابع مشابه
MIMO OTA Testing Based on Transmit Signal Processing
Usually, multiple-input-multiple-output (MIMO) testbeds are combined with channel emulators for testing devices and algorithms under controlled channel conditions. In this work, we propose a simplemethodology that allows over-the-air (OTA)MIMO testing using a MIMO testbed solely, avoiding the use of channel emulators. The MIMO channel is emulated by linearly combining the signals at the testbed...
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It is not possible to do direct tests to find the best LTE multi-antenna configuration for optimizing antenna diversity gain, antenna MIMO capacity or device throughput with the traditional antenna measurement method, i.e. an anechoic chamber. Of the two alternatives for making direct measurements, i.e. drive tests and the reverberation chamber, the reverberation chamber offers many advantages....
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High-quality wireless devices require an omnidirectional and uniform antenna radiation pattern. This pattern can be verified by measuring the over-the-air (OTA) performance. These measurements, which are an essential part of the certification test, need to be extended to include MIMO operating modes. The Rohde&Schwarz two-channel test method makes these measurements both cost-effective and repr...
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Adaptive switching between multiple-input multiple-output (MIMO) transmission schemes like diversity and spatial multiplexing yields significantly higher capacity gains over fixed transmission schemes. Previous work has shown the impact of channel correlation and SNR on the switching between different schemes like beamforming and spatial multiplexing. This paper explores the influence of antenn...
متن کاملPattern Reconfigurable Circular Patch Antenna for Mimo Communications
This paper presents a reconfigurable two-port circular patch antenna that improves the performance of a MIMO wireless communications system through pattern diversity. Different modes of the circular patch antenna can be excited by varying its radius with PIN diode switches. Based on this antenna architecture a practical algorithm that exploits the wireless channel spatial selectivity to select ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Antennas and Propagation
سال: 2013
ISSN: 0018-926X,1558-2221
DOI: 10.1109/tap.2013.2279805